protobuf/objectivec/GPBField.h

// Protocol Buffers - Google's data interchange format
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#import <Foundation/Foundation.h>

@class GPBCodedOutputStream;
@class GPBUInt32Array;
@class GPBUInt64Array;
@class GPBUnknownFieldSet;

@interface GPBField : NSObject<NSCopying>

@property(nonatomic, readonly, assign) int32_t number;

// Only one of these will be set.
@property(nonatomic, readonly, strong) GPBUInt64Array *varintList;
@property(nonatomic, readonly, strong) GPBUInt32Array *fixed32List;
@property(nonatomic, readonly, strong) GPBUInt64Array *fixed64List;
@property(nonatomic, readonly, strong) NSArray *lengthDelimitedList;
@property(nonatomic, readonly, strong) NSArray *groupList;

// Only one of these should be used per Field.
- (void)addVarint:(uint64_t)value;
- (void)addFixed32:(uint32_t)value;
- (void)addFixed64:(uint64_t)value;
- (void)addLengthDelimited:(NSData *)value;
- (void)addGroup:(GPBUnknownFieldSet *)value;

@end